collision with an RV on Highway 101 in what California Highway Patrol officials described Tuesday as a road rage incident.

The motorcyclist, who was not immediately identified, was traveling south on U.S. 101 shortly after noon Monday, when he got into an altercation with the RV driver, said CHP Officer Terry Uhrich.

A witness told investigators that the motorcyclist made obscene gestures before suddenly pulling in front of the larger vehicle and slamming on the brakes, Uhrich said. The rear wheel of motorcycle got caught under the front right bumper of the RV, which lost control and slammed into the center divider, he said.

The biker, 57 was ejected from the motorcycle and pronounced dead at the scene. Uhrich noted that the biker was wearing a so-called skull cap which partially covered his head but is not certified and did not provide protection in the event of collision.